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SAT® Subject Test in Math 1 & 2

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Moderate

Arc Length

SATSTM-KFM5IN

Given the circle below with a radius of $20\text{cm}$, the length of arc $\text{AB}$.

A

$80$

B

$800$

C

$\cfrac{140}{3}\pi$

D

$\cfrac{40}{9}\pi$

E

$\cfrac{80}{9}\pi$